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001     888190
005     20230111074323.0
024 7 _ |a 10.1016/j.jcis.2020.08.106
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024 7 _ |a 1095-7103
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041 _ _ |a English
082 _ _ |a 540
100 1 _ |a Koch, Lukas
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245 _ _ |a Emulsion templating: Unexpected morphology of monodisperse macroporous polymers
260 _ _ |a Amsterdam [u.a.]
|c 2021
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520 _ _ |a Hypothesis: We synthesised monodisperse macroporous polymers via polymerisation of water-in-monomer droplet emulsions and obtained non-spherical pores with layered pore walls. We hypothesise that this morphology is caused by surfactant diffusion and phase separation during polymerisation.Experiments: We varied the surfactant mass fraction of the emulsions and polymerised the templates with a water-soluble initiator. From the resulting macroporous polymers we determined the shape of the pores and thickness of the layers via scanning election microscopy. The response of the monomer/surfactant mixture to polymerisation was studied by a ternary phase diagram that simulated polymerisation. Findings:The emergence of non-spherical pores with layered pore walls is indeed caused by surfactant diffusion and phase separation. During polymerisation the surfactant molecules diffuse either to the water/monomer interface or deeper into the continuous monomer phase. The first process results in non-spherical pores, while the second process generates layered pore walls.
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650 1 7 |a Polymers, Soft Nano Particles and Proteins
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693 _ _ |a Forschungs-Neutronenquelle Heinz Maier-Leibnitz
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700 1 _ |a Botsch, Sophia
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700 1 _ |a Stubenrauch, Cosima
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773 _ _ |a 10.1016/j.jcis.2020.08.106
|g Vol. 582, p. 834 - 841
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856 4 _ |y Published on 2020-08-29. Available in OpenAccess from 2021-08-29.
|u https://juser.fz-juelich.de/record/888190/files/p2.pdf
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